Artemisia borealis |
Artemisia tripartita |
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boreal wormwood, field sagewort |
cut-leaf sagebrush, three-tip sagebrush |
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Habit | Perennials, (6–)8–20(–40) cm (cespitose), mildly aromatic; taprooted, caudices branched. | Shrubs, 5–15 or 20–150(–200) cm, aromatic; root-sprouting (caudices with adventitious buds, fibrous rooted). | ||||||||
Stems | (1–)2–5, gray-green, tomentose. |
pale gray, glabrous. |
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Leaves | persistent, basal rosettes persistent, gray-green to white; blades ovate, 2–4 × 0.5–1 cm, 2–3-pinnately or -ternately lobed, lobes linear to narrowly oblong, apices acute, faces moderately to densely sericeous. |
deciduous, gray-green; blades broadly cuneate, 1.5–4 × 0.5–2 cm, deeply 3-lobed (lobes 1–1.4 mm wide, acute; cauline leaves smaller, mostly 3-lobed). |
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Involucres | hemispheric, 3–4 × 3.5–4 mm. |
globose or turbinate, 2–4 × 1.5–3 mm. |
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Florets | pistillate 8–10; functionally staminate 15–30; corollas (or lobes) yellow-orange or deep red, 2.2–3.5. |
3–11; corollas 2–2.5 mm, glandular (style branches included). |
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Phyllaries | (obscurely scarious) densely tomentose-villous. |
broadly lanceolate (margins scarious, obscured by indument), canescent. |
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Heads | (proximal sessile, distal pedunculate) in (leafy) spiciform arrays 4–9(–12) × (0.5–)1–5 cm. |
in paniculiform or spiciform arrays (5–)8–15(–35) × (0.5–)1–5 cm. |
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Cypselae | oblong-lanceoloid, somewhat compressed, 0.4–1 mm, faintly nerved, glabrous. |
(columnar, unequally ribbed) 1.8–2.3 mm, glabrous or resinous. |
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Artemisia borealis |
Artemisia tripartita |
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Distribution |
AK; CA; CO; ID; MT; UT; WA; WY; AB; BC; NT; NU; SK; YT; especially at high elevations and northern latitudes; Eurasia
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ID; NV; OR; WA; WY; BC
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Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 19, p. 505. | FNA vol. 19, p. 518. | ||||||||
Parent taxa | Asteraceae > tribe Anthemideae > Artemisia > subg. Drancunculus | Asteraceae > tribe Anthemideae > Artemisia > subg. Tridentatae | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | A. campestris subsp. borealis | A. trifida, A. tridentata subsp. trifida, Seriphidium tripartitum | ||||||||
Name authority | Pallas: Reise Russ. Reich. 3: 755. (1776) | Rydberg: Mem. New York Bot. Gard. 1: 432. (1900) | ||||||||
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